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4 pes Integrated Septic Services, Is manufacturer of septic tanks whose slogan is we are number 1 in the number 2 business. The firm is expected to pay a $2.50 dividend at year end (DIE $2.50), the dividend is expected to grow at a constant rate of 5.50% indefinately, and the common stock currently sells for $52.50 a share. The before-tax cost of debt is 7.50%, and the tax rate is 40%. The capital structure consists of 45% debt and 55% common equity. What is the company's WACC If all the equity used is from retained earnings? 7.07% 7.36% 7.67% 7.989